20 



DK. F. E. BEDDARD ON 



The dilated region of the vagina (the dilatation is very slight) 

 has apparently not got a ciliated lining. It has a covering of 

 glandular cells externally which is obviously continuous with, and 

 presumably derived from, the glandular subcuticular layer of the 

 body generally. The shell-gland is large and conspicuous, and 

 the " Schluckapparat " is particularly muscular and strong. I 

 have observed a duct arising from each peripheral vitelline series, 

 and there is in short nothing of particular note in this pai-t of 

 the generative system. 



View of a ripe proglottid of Iclithyotwnia (Acanthofania) varia, to illustrate 

 the extent of the mature uterus. 



JB. Egg-clumps scattered through the uterus, which occupies the greater part of 

 the proglottid. T. Testes. 



The uterus of this species when fully formed and containing 

 embryos occupies a good deal of the middle region of ripe 

 proglottids (see text-fig. 5). Its aspect in transverse sections is 

 quite like that of Ichthyotcenia nilotica described above, and no 

 definite specific difierences appear to me to be obtainable from 

 a comparison of these organs. The eggs, however, are highly 

 characteristic when the present species is compared with Ichthyo- 

 tcenia nilotica. They ai-e disposed for the most part within the 

 cavity of the uterus in clumps of varying numbers, perhaps 12-20 

 in each batch of eggs. Three or four of these, or often more, 

 may be visible in a single transverse section. The mode of 

 aggregation of the individual eggs (which, of course, contain 

 enibryos) in Ichthyotcenia varia is thus different from that which 

 is found in Ichthyotcenia nilotica. They also appear very con- 

 siderably larger, the difierence in size being principally a question 



